We had our annual service and inspection of our Klargester bio filter this morning. The engineer said he’s never seen it in such good condition and significantly less sludge than in previous years – we now have another 6 months before the disludge rather than as in previous years when we would need to organise it immediately after the January service. He’s a man who loves his job – he even said it smelt much better than most units. I wasn’t tempted to verify this!!